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10 December, 14:51

32x+2y=90

19x+4y=90

Find X and y

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Answers (1)
  1. 10 December, 18:03
    0
    x = 2

    y = 13

    Step-by-step explanation:

    Given that:

    32x+2y=90 ... eq 1

    19x+4y=90 ... eq 2

    Now multiply eq 1 with 2

    We get:

    64x + 4y = 180 ... eq 3

    Subtracting eq 2 from eq 3:

    (64x + 4y) - (19x + 4y) = 180-90

    Negative sign will inverse signs of next bracket:

    64x + 4y - 19x - 4y = 90

    Adding like terms:

    45x = 90

    Dividing both sides by 45:

    x = 90/45

    x = 2

    Now putting value of x in eq 1:

    32x + 2y = 90

    32 (2) + 2y = 90

    64 + 2y = 90

    Subtracting 64 from both sides:

    64-64 + 2y = 90 - 64

    2y = 26

    Dividing both sides by 2

    y = 26/2

    y = 13

    So

    x = 2

    y = 13
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